A: Legally, no. However, if you have a library card, check the Kanopy or Hoopla app. Some libraries have digital rights to stream The Land Before Time (usually only the first movie). You cannot "keep" the file; it expires after 72 hours.
A: No. Only the original 1988 film has a Blu-ray release. Sequels 2-13 were mastered in Standard Definition for DVD. Streaming services have "upscaled" them to HD, but they will never look like Pixar films. DVD is the native format for movies 2-13.
While a "deep paper" on The Land Before Time series often examines its themes of prejudice, loss, and environmental survival
You’ll see pirate sites offering “complete 13-movie pack.” Risks include: